See Thread at: http://www.techienuggets.com/Detail?tx=45643 Posted on behalf of a User You must make sure your JAVA_HOME is not in variable enviroment but in system enviroment . The other thing is when you install jdk they say you should difine the directory C:\Program Files\Java\jdk1.5.0_14\jre\bin you should change that to C:\Program Files\Java\jdk1.5.0_14 In Response To: When I install JBoss as windows service, it works fine, but after several test on VPC, I hit this error: anonymous wrote : Starting JBoss Application Server 5.0 [2008-07-24 04:18:06] | ECHO is off. | JAVA_HOME is not set. Unexpected results may occur. | Set JAVA_HOME to the directory of your local JDK to avoid this message. | =============================================================================== | | JBoss Bootstrap Environment | | JBOSS_HOME: C:\jboss-4.2.2.GA | | JAVA: java | | JAVA_OPTS: -Xrs -Dprogram.name=run.bat -server -Xms128m -Xmx512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 | | CLASSPATH: C:\jboss-4.2.2.GA\bin\run.jar | | =============================================================================== | | Error: no `server' JVM at `C:\Program Files\Java\jre1.5.0_15\bin\server\jvm.dll'. | Shutdown JBoss Application Server 5.0 service [2008-07-24 04:18:07] I found this post but nobody answered http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3987689#.... anyone?